Package: pv Version: 1.5.7-2 Severity: normal It looks like --buffer-size does not do what I would have expected:
$ strace -e read pv -B 4096 /etc/motd > /dev/null read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\34\2\0\0\0\0\0"..., 832) = 832 read(3, "# Locale name alias data base.\n#"..., 4096) = 2492 read(3, "", 4096) = 0 read(3, "\nThe programs included with the "..., 131072) = 286 read(3, "", 130786) = 0 read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\5\0\0\0\0\0\0"..., 832) = 832 286 O 0:00:00 [59,5KiB/s] [===========================================================================================================================================>] 100% +++ exited with 0 +++ I would have expected --buffer-size to change the size of the read() system call as well as the internal buffer size. In fact, I am not sure I understand what --buffer-size does at all. :) -- System Information: Debian Release: 8.3 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'stable'), (1, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 4.2.0-0.bpo.1-amd64 (SMP w/2 CPU cores) Locale: LANG=fr_CA.UTF-8, LC_CTYPE=fr_CA.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages pv depends on: ii libc6 2.19-18+deb8u4 pv recommends no packages. Versions of packages pv suggests: ii doc-base 0.10.6 -- no debconf information
